
Three years ago, in the land of Reinbulk, a Legendary Hero was summoned in the Kindom of Leezalion and he succeeded in repelling the Demon King. Now, five students are summoned back into Reinbulk by the Kingdom of Luxeria to fight against the Demon King and the demon army. Unlike the other heroes, Yashiro Yuu has no magical affinity and the Luxeria Kingdom has no intention on acknowledging his existence or returning him to his world. However, Yuu is actually the previous Hero that had fought the Demon King. Moreover, he is perplexed at the situation since he knows the Demon King has not returned since he sealed him. If the seal was ever broken then he would be automatically summoned instead of normal summoned. Since he already saved the world once and the Demon King hasn't been unsealed, Yuu decides to leave the demons to the new heroes and retire from the Hero business. So he decides to become an adventurer.
Sendai Yuusha wa Inkyou Shitai is a Japanese novel of 409,664 characters, with 14,703 unique words and 2,204 different kanji. Its difficulty rating on Jiten is hard, 3.4 out of 5. The full vocabulary list ranks all 14,703 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.